Country ISD Code info :

Country	ISD Code
Afghanistan	93
Albania	355
Algeria	213
Andorra	376
Angola	00244-4
Anguilla	001-264
Argentina	54
Armenia	374
Aruba	297
Australia	61
Austria	43
Azerbaijan	994
Bahamas	001-284
Bahrain	973
Bangladesh	880
Barbados	001-246
Belarus	375
Belgium	32
Belize	501
Benin	229
Bermuda	001-441
Bhutan	975
Bolivia	591
Botswana	267
Brazil	55
Bulgaria	359
Burkina Faso	226
Burundi	257
Cambodia	855
Cameroon	237
Canada	1
Central African Republic	236
Chad	235
Chile	56
China	86
Christmas Island	0061-9164
Congo	242
Costa Rica	506
Croatia	385
Cuba	53
Cyprus	357
Czech Republic	420
Denmark	45
Djibouti	253
Dominica	1
Dominican Republic	001-809
Ecuador	593
Egypt	20
El Salvador	503
Equatorial Guinea	240
Eritrea	291
Estonia	372
Ethiopia	251
Fiji	679
Finland	358
France	33
Gabon	241
Gambia	220
Georgia	995
Germany	49
Ghana	233
Gibraltar	350
Greece	30
Grenada	001-809
Guadeloupe	590
Guam	671
Guatemala	00502-9
Guinea	224
Guyana	592
Haiti	509
Honduras	504
Hong Kong	852
Hungary	36
Iceland	354
India	91
Indonesia	62
Iran	98
Iraq	964
Ireland	353
Israel	972
Italy	39
Jamaica	001-876
Japan	81
Jordan	962
Kazakhstan	007-336
Kenya	254
Kiribati	686
Kuwait	965
Laos	856
Latvia	371
Lebanon	961
Lesotho	266
Liberia	231
Liechtenstein	0041-75
Lithuania	370
Macau	853
Madagascar	261
Malawi	265
Malaysia	60
Maldives	960
Malta	356
Marshall Islands	692
Mauritania	222
Mauritius	230
Mexico	52
Moldova	373
Monaco	0033-9
Mongolia	976
Morocco	212
Mozambique	258
Nigeria	234
Norfolk Island	00672-3
North Korea	850
Norway	47
Oman	968
Pakistan	92
Palau	680
Panama	507
Papua New Guinea	675
Paraguay	595
Peru	51
Philippines	63
Poland	48
Portugal	351
Puerto Rico	001-787
Qatar	974
Romania	40
Russia	7
Rwanda	250
San Marino	378
Saudi Arabia	966
Sierra Leone	00232-232
Singapore	65
Slovakia	421
Slovenia	386
Somalia	252
South Africa	27
South Korea	82
Spain	34
Sri Lanka	94
Sudan	249
Suriname	597
Swaziland	268
Sweden	46
Switzerland	41
Taiwan	886
Tajikistan	992
Tanzania	255
Thailand	66
Togo	228
Uzbekistan	7
Venezuela	58
Vietnam	84
Yemen	969
Yugoslavia	381
Zaire	243
Zimbabwe	263

Generations of mobile communications

The first generation (1G) of mobile communications was introduced in the late 1970s; it was primarily used for voice transfer. In the early 1990s, second generation (2G) systems came into existence and was further developed to 2.5G, which includes GSM, TDMA and CDMA. These were used for voice and data.The next generation of mobile communications is 3G and this delivers data speeds from 384 kbps to 2 Mbps and over wireless interfaces such as GSM, TDMA and CDMA

Mobile phone access technologies

The first-generation analog mobile access method; FDMA uses separate frequencies for each call. For example if there are four stations, each will receive their own frequency. Thus there is no interference between them. This reduces interference, but limits the number of users.TDMA allocates unique time slots to each user within each channel, thus allowing many users to access the radio frequency without anyone's interference. Each mobile conversation uses only a particular frequency slot of the time. Commercially introduced in 1995 by Qualcomm, CDMA quickly became one of the world's fastest-growing wireless technologies. 3G CDMA networks provide more capacity for voice traffic, along with high-speed data capabilities, hence many cellular service providers are now building or upgrading to it.Developed on TDMA protocol in Europe, GSM is now the worldwide standard technology for mobile communications. The advantage of GSM is that it provides a high level of security, globally accepted technology standards and superior sound quality.

Wireless technology platforms: GPRS, EDGE and WAP

What is GPRS?GPRS, short for General Packet Radio Services, is an enhancement to GSM technology that integrates GSM and IP technology. GPRS offers an always-on, high speed connectivity to the Net. Thus you can check your email on the move and surf the Web at high speeds.

What is WAP?In this hi-tech age, people on the move need any-time access to the Net. This is where WAP comes in. It provides Internet access to cell phones. It is an open standard for wireless protocols that is independent of the service providers. To display Web content, the cell phone must have a WAP browser. Nowadays, cell phones often come with WAP and GPRS technology.

What is EDGE?The new EDGE ((Enhanced Data GSM Environment) interface has been developed specifically to meet the bandwidth needs of 3G. Promoted by Ericsson, it offers high-speed data transfers over GSM networks with just a software upgrade to the handset. EDGE allows speeds up to 384 kbps.

Samsung Ativ S
Status : Coming Soon
 
Expected Price :Rs.31,000 

Description : Samsung Ativ S is the first Windows Phone 8 Smartphone which is powered by 1.5 GHz Dual Core Processor. It comes with 4.8 inch HD Super AMOLED display and 8 MP Camera.

Capacity battery : 2300 mAh  

Size : 1280x720 pixels

Resolution : 3264x2448 pixels 

Technology / Frequency Bands : GSM : 850/900/1800/1900 MHz HSDPA : 900/2100 MHz

Camera : Yes 8.1 MP

Ram : 1 GB